x=2cosa-cos2a,y=2sina-sin2a

CosA x cos2A + ((sin2A)^2)/2cosA

Prove: 1/cos2A+sin2A/cos2A=sinA+cosA/cosA-sinA

Sin4A - cos4A = sin2A - cos2A Can i just square root the left side??:O

FindA if (2sinA\2)squared=2

Prove : 1 + Sin2A/ Cos2A = CosA + SinA / CosA- SinA

prove that 2sinA + 1 / cosA+sin2A=secA

if 10A=4/3, find (3sinA+2cosA)/(3sinA-2cosA)

Prove that (cos2A)÷ ( 1+sin2A) = (cotA -1) ÷ (cotA +1)

2sinA+5cosA=4. Prove that cosA=1/2

f(a)=sin2a(10^sin2a). find f'(a)

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